Furnace-mouth



(No Model.)

T. OBRIEN'.

FURNACE MOUTH.

No. 291,763. Patented M11 8, 1884 J j j i UNTTED STATES PATENT TIMOTHY OBRIEN, OF BOSTON, MASSACHUSETTS.

FURNACE-MOUTH.

SPECIFTCATION forming part of Letters Patent No. 291,763, dated January 8, 1884.

Application filed June 11, 1883.

IO and use the same, reference being had to the accompanying drawings, forming a part of this specification, in which Figure 1 is an isometrical perspective view, showing the inner or rear side of my improved i5 furnace-mouth; Fig. 2, avertical longitudinal section of the same, taken on the line 00 w,- and Fig. 3 a top'plan view, showing the side and front of the mouth in crosssection.

Like letters of reference indicate corresponding parts in the different figures of the drawings.

Myinvention relates to that class of furnace-mouths which are employed in connection with steam-boilers, heating-furnaces, &c.; and

it consists in an auxiliary jamb-plate or guard,

constructed and arranged to operate as hereinafter more fully set forth and claimed, by which a more effective device of this character is produced than is now in ordinary use.

In furnace-mouths as usually constructed the jamb-plates, or plates on either side of the opening or mouth proper, are rapidly destroyed or warped and rendered unfit for use by the intense heat of the furnace. A diffrculty also exists in ordinary furnaces arising from the unconsumed coal or fuel, which accumulates in the rear of the jainbs, or in the front corners of the body of the furnace.

My invention is designed to obviate these difficulties and objections, and to that end I make use of means which will be readily understood by all conversant with such matters from the following explanation, the extreme simplicity of the invention rendering an elabcrate descrip ion unnecessary.

In the drawings, A represents the opening or furnace-mouth proper; B, thefaee-plate; O, the arch, and D the bed-plate or hearth; E E, the jambs, and G G the guards or auxiliary 5o jambs.

The bed D and arch O are respectively provided with transverse grooves m m, in which the guards G are fitted to slide, being inserted from the inside of the furnace,

(N0 model.)

and pushed forward against the plate B, leaving an air space or fine, 12, between the jarnb and guard, into which a series of perforations, f, formed in the plate B, open.

The guard consists of a body or side piece, a, end piece, t, the flange l, the flange being provided with a series of perforations, n, opening from the air-space '0 into the front corners of the furnace. The end piece, t, of the guard G stands at right angles to the body a, and the flange Z at right angles to the end piece, If, and in parallelism with the body a, the length of the flange Z preferably corresponding with the width of the air-space o, and the length of the end piece, t, being such as to overlap the inner end of the jamb E.

In the use of my improvement the guards or auxiliary jambs G are inserted in the grooves m from the inner side of the furnace, and pushed outwardly in said grooves until they come into contact with the face-plate B, thus forming a continuous air space or flue opening inwardly through the perforationsf a.

From the foregoing it will be seen that the jambs or guards G afford protection to the jambs E, and also a means of conducting a current of air to the interior of the furnace, in such a manner as to produce perfect combustion of the fuel, which accumulates in the forward corners of the same, as described.

Having thus explained my invention, what I claim is 1. In a furnace-mouth substantially such as described, the guards or jambs G, pro vided with the perforations a. in combination with the plate B, provided with the perforations f, constructed, combined, and arranged to operate substantially as set forth.

2. In a furnace-mouth substantially such as described, a guard for protecting the jamb, so constructed and arranged as to form a flue for conducting a current of air around said jamb on its outer side, and discharging the same into the corner of the furnace to produce more perfect combustion of the fuel in that locality, substantially as specified.

3. The guard G, consisting of the body at, end piece, t, and flange Z, for protecting the jamb of a furnace, substantially as set forth.

TIMOTHY OBRIEN.

Witnesses:

O. A. SHAW, A. W. SAWYER. 

